today" live and howard kurtz is host of cnn's reliable sources. and howe wi, this week we'll look at fresh reporting from pro-publica. >> the award winning investigative web site that asks its readers to send in examples of fund-raising e-mails they got from the presidential campaign. turns out campaigns now know so much about you from the use of technology. president obama's campaign is particularly good at this. they can come up with five, six, seven different versions of it targeted to specific types of donors or potential do donors. >> for example, if you go to pro-publica's web site, you can go the messages machine which is is in beta testing but will be u.n. veiled. you can go to "before midnight tonight" which was an e-mail sent out by michelle obama. >> i got that one! >> did he say you "hey, iend? >> we're very tight! >> this one says barack is so grateful to everyone's who has his back, he'd like to sit down with each of you and personally thank you. if you go to the next one, take a look, the red is what's deleted and here it is, the gr